Blow-off valve.



J. ROTHGHILD.

BLOW-OFF VALVE.

APPLICATION FILED DEO.31, 1908.

Patented May 4, 1909.

W inventor: b)

I 65% M Q. A -M.

A ttest: 6

UNITED STATES PATENT OFFICE.

JOSEPH ROTHCHILD, OF NEW YORK, N. Y., ASSIGNOR TO JOHN SIMMONS COMPANY, OF NEW YORK, N. Y., A CORPORATION O l NEW YORK.

BLOW-OFF VALVE.

Specification of Letters Patent.

Patented. m 4, 1900.

Application filed December 31, 1908. Serial No. 470,146.

To allwhom it ma 1 concern:

Be it known that l, JOSEPH Ro'rncinrn, a citizen of the United States, and resident of the borough of the Bronx, county of New York, in the State of New York, have invented certain new and useful lm rovements 111 Blow-Ofi Valves, of which tie fol-' nited States, Serial No. 371,713, tiled May 3, 1907, and like that valve has for its obiect standing great ressures and kept closed thereby, yet readily moved, free from wear, readily lubricated and cheaplymade.

In the drawings, Figure 1 is a central vertical section of the valve with the parts assembled, a portion of the discharge cylinder being shown in elevation; Fig. 24s a bottom plan view of the detachable turping head; Fig. 3 is a top plan view of the parts shown in Fig. 1 Fig. 4 is a perspective of the assembled segments of the slide valve; Fig. 5. is a section on the plane of the line 55 in Fig. 1 and a top ilan view of the discharge cylinder beneath that plane, and Fig. 6 isa perspective view of the discharge cylinder, the encircling slide valve segments and the valve stem.

In the drawings, 10 is a valve casing. It has at one side an external annular flange 11 internally threaded at 12 to connect with a. 1

pipe or other conduit and which flange openmg constitutes the inlet port of the valve. At another convenient place it is provided with a small external annular flange 13 internally threaded at 14 to receive a threaded plug 15.

It is restricted to a neck at 10' and 1- 25. This comprises a cylindrical body expanded at the )ottom 26 to form a shoulder 27 to afford a support for the encircling slide valve. It is further expanded at the bottom to form an annular flange 28 provided with a series of apertures 29 registering With the recesses 19 of the casing and adapted to receive the screws 20. It is provided with two longitudinal ports indicated at 3O, 30,

and in its upper part is traversed by a partition 31 whereby there is formed between it and its flat top 32, a chamber 33 constituting an oil reservoir. Channels 34 longitudinally arranged are formed in the external surface of the cylinder 25 and their upper ends communicate with the chamber 33 by ducts 35..

There is a hole in the top 32 closed by a plate the production of a valve capable of withi 36 from which there extends upwardly an oil conduit or pipe 37 internally threaded at the top to receive a threaded screw plug 38.

Supported upon the shoulder 27 of the. cylinder L5 is the slide valve made of two cylindrical segments .40, 40, identical in size and shape, both provided with a pair of projecting ears -11, 41, both recessed at 42, 42, andboth having a right angled upper posi tioning disk 43, 43, recessed at 44 to engagethe pipe 37. When assembled and when the inner edges of the two segments nearly touch, they form together a cylinder open at the bottom and closed at the top with diametrically opposite ports adapted to register with the 'ports 30 of the discharge cylinder.

The encircling slide valve is rotated by means of a. hollow valve stem .50, having two domiwardly projecting forks 51, 51, adapted to pass hetween and loosely eng; "e the cars 41 of the slide valve. The stem is squared at 52 to form a turning head and one of its straight edges 53 is truncated in order acis provided at the upper end of the neck 1 with two lugs 17, 17, which serve as stops for the valve stem presently to be described.

curately to determine the position with respect to it of a detachable turning head 59.

Air-ore the squared head it is rounded at 5% and externally threaded and lncloses the ipipe 37 which projects upwardly through The lower edge 18 of the casing is flat and is provided with a number of recesses 19 internally threaded to receive the externally threaded ends of screws 20 adapted to hold the flange of the discharge cylinder in p0sition.

Within the-casing is the discharge cylinder the casing.

Within the upper rim of the casing is a bushing 55 having an outwardly projecting annular flange 56 and between the lower edge of which and an inwardly projecting annular flange 57 of the'casing, is a suitable packing 58. Arranged above the bushing 55 and resting upon it is a detachable turning head .59 having, an annular flange 60 at its bottom and provided with a projecting iin 61 adapted to engage. the lugs 17, 17, ont-he casing. It also has one of its inner edges 62 beveled to register and engage with the corresponding outer beveled edge 53 of the squared head 52. A cap 65 serves to cover the top of the stem 50.

. Like the construction of the valve described in thepatent above referred to, the valve WillCll is the subject matter of this application is tightened by the pressure of the incoming fluid against which it is closed. This pressure is brought to bear against the se ment of the encircling slide opposite the et port of the casing and serves to press this segment against the corresponding portion of the discharge cylinder and to close it efiiciently. Each of the segments of the slide valve are slightly longer internally than the external length of the discharge cylinder above the flange on which they rest, so that theyclear the top of this cylinder. This con struction atl'ords an allowance for any grindin wear on the bottom of the segments.

t will be no ed that the encircling slide valve can only be moved by the rotation ol' the stem a quarter of a revolution and that such movement is suilicient to open the valve fully or when in the reverse direction to close it' completely. Furthermore, it will he noticed that no complete rotation of the stern and the encircling slide valve can take place, but that these parts are only permitted to oscillate and cannot become displaced when the parts have once been assembled. Another advantagejof this form of valve isthat the valved casing itself forms no part of the seat of the valve, but the eiiectivo portions of the valve in contact with each other are between the independent segments oi the slide valve and the outer surfaces of the discharge cylinder, all of which parts are independent of the casing. Consequently no distortion of the casing, due to undue expansion and contraction of the pipes or fittings with which it is connected, can all ect the efficiency of the valve, because such distortion will not be carried to the contacting surfaces.

The valve segments being movable with respect to the discharge cylinder and there being an appreciable space between the out side of these se ments and the inner wall of the casing, it follows that the hollow pipe. 37. the reservoir chamber 33, and the ducts 35 and channels in the discharge cylinder may allbe blown out provided the end of the pipe 37 is connected with a pump or other source of fluid pressure, so that air bubbles or inipurities may readily be removed from these arts and a fresh supply of clean oil be read- 11y introduced thereto. This cannot be done when the valve is rigid with respect to 65 either the casing or the discharge cylinder.

'ihe small port on that side of the casing opposite the inlet port is intended to ailord access to the interior of the valve in order that itncbe cleaned and it is arranged diametrically opposite such inlet port for the purpose oi allowing a cleaning tool to be inserted therein, and, if necessary, to reach. lHlCtK into the pipe or conduit connected to ihe inlet hange on the casing. l have shown this port of small size, but it may, of course, he made of any convenient size, and in some instances may be made even as large as the inlet port.

'i he parts of the valve are very simple in their construction and are very cheaply made, because they require very little machine finishing or accurate surfacing. 'ihcy are quickly put together, and as quickly disassembled bysimple tools, and in such-a manner that no part icnlar shill is required of the workmen.

lv hai l claim as new is?" l. in a alve of the character described, a discharge cylinder provided with ports and having an oil reservoir provided with channels leading therefrom to the external surlace ol' the cylinder.

2. in a valve of the character described, a discharge cylinder having an internal oil rcs (r1 oir, channels formed in the outer surface of the cylinder and ducts leading from the reservoir to said channels.

2-3. In a valve of the character described, a discharge cylinder no idod with ports, and having an internal oil reservoir, channels formed in the outer surface ol the cylinder and ducts loading from the reservoir to said channels.

4. in a valve of the character described, a discharge cylinder, an encircling valve,- a stem adapted loosely to engage the valve and by which it may be rotated, an oil reseryoir in the. cylinder and a conduit through the stem leading thereto.

5. in a val e of the character described, a discharge vli1nler, an encircling valve, a stem adapted loosely to engage the valve and by which it may be rotated, an oil reservoir in the cylinder; a conduit through the stem leading thereto, channels formed in the outer surface of the cylinder and ducts leading from the reservoir to said channels.

e. A blow-oil valve comprising a discharge cylinder provided with suitable ports,

Ea slide valve provided with ports and the cylinder and channels leading therefrom to the contacting surfaces.

7. In a valve of the character described, a discharge cylinder, an encircling valve, a stem adapted to engage the valve and by means of which it may be oscillated, an oil tween the cylinder and valve and means forlimiting the extent of oscillation of the valve.

8. in a valve of the character described, a discharge cylinder, an encircling val \"e, a stem adapted to engage the valve andby means of which it may be oscillated, an oil reservoir within the cylinder, longitudinal channels leading therefrom to the contacting surfaces between the cylinder and valve and means for limiting the extent of movement of the valve to prevent the uncovering of said channels.

9. In a valve of the character described, coin rising a casing, a centrally arranged disc arge cylinder having longitudinal ports in its sides, a transverse oil reservoir at one end and a terminal flange whereby it may be secured to the casing.

10. in a valve of the character described, com rising a casing, a centrally arranged disc arge cylinder having longitudinal ports in its sides, a transverse oil reservoir at one end and a terminal flange whereby it may be secured to the casing and an intermediate shoulder ada ted to form a support for an encircling sli e valve.

11.- he valve of the character described.

comprising a casing, a centrally arranged discharge cylinder having longitudinal ports in its sides, a transverse oil reservoir at one end and a terminal flange whereby it may be. sccured to the casing and an intermediate shoulder adapted to form a support for an encircling slide valve having ports adapted to register with those of the cylinder.

11!. In a valve of the kind described, a discharge cylinder having an interior oil reser voir, a pipe leading thereto on the one side and ducts leading therefrom on the other.

13. A blow-oil valve comprising a discharge cylinder, an encircling slide valve therefor, ahollow stem adapted to engage the slide valve, an oil reservoir within the cylinder and a pipe leading to the reservoir and passing through the stem.

14. A blow-oil valve comprising an external casing, a discharge cylinder, an encircling slide valve therefor, a hollow stem adapted to engage the slide valve, an oil reservoir within the cylinder and a pipe lead ing to the reservoir and passing through the stem;

15. A bloW-ofl' valve comprising a discharge cylinder provided with ports and having a top plate and an outwardlyextendin flange and an encircling slide-valve adaptec. to rest on the flange and'made of independent segments, each provided with inwardly extending flanges adapted to rest on the top plate.

16. A blow-off valve comprising a discharge cylinder provided with ports and having a top late and an outwa dly extending flange, an an encircling slide valve adapted to rest on the flange and made of independent segments, each provided with inwardly extending flanges adapted to rest on the top plate and means for oscillating the slide valve, consisting of a stem adapted loosely to engage both segments.

17. A blow-ofl' valve comprising a dis charge cylinder provided with an internal oil reservoir and channels leading therefrom to the surface of the cylinder and having ports, and having a top plate and an out wnrdly extending flange, and an encircling slide valve adapted to rest on the flange and made of independent segments,-both pro vided with inwardly extending flanges adapted to rest on the top plate.

18. A blow-ofl' valve comprising a discharge cylinder provided with an internal oil reservoir and channels leading therefrom to the surface of the cylinder and having ports, and having a top plate and an out- Wardly extending flange, and an encircling slide valve adapted to rest on the flange and made of independent segments, both provided with inwardly extending flanges adapted to rest on the top plate and means for oscillating the slide valve, consisting of a stem adapted loosely to engage both segments.

19. A blow-oil" valve comprising a disflanges adapted to rest on the top plate and,

means for oscillating the slide valve, consisting of a stem adapted loosely to engage each segment.

20. A blow-oil valve comprising a discharge cylinder provided with ports and hav ing an interior oil reservoir and a top plate and an outwardly extending flange, and an encircling slide valve adapted to rest on the flange, and made of independent segments, each provided with inwardly extending flanges adapted to rest on the topplate and means for oscillating the slide valve, consisting of'a stem adapted loosely to engage each segment and which stem is hollow and is provided with a conduit leading to the oil reservoir of the discharge cylinder.

21. ,A. blow-oil valve comprising a casing, a discharge cylinder, an encircling slide valve, a stem ada ted loosely to engage the slide valve, a ho e therethrough, an oil reservoir in the cylinder and a pipe in the hole leading the cylinder and a pipe in the hole leading I ada' tited to limit the movement of the turning to the reservoir and a detachable turning head on the stem.

23. Ablovwoflvalve,comprisinga casing,a 1

the reservoir, a turning head on the stein,

and means on the casing cooperating therewith to limit=the extent of oscillation of the valve.

24. A blow-oil valve comprising a casing, a

discharge cylinder, an encircling slide valve,

a stem adapted loosely to engage the slide valve, a hole therethrough, an oil reservoir in the cylinder and a pipe in the hole leading to the reservoir and a detachable turning head on the stem and means for positioning it with respect to the stem.

25. A blow-ofl' valve comprising a casing, a discharge cylinder, an encircling slide valve, a stem adapted loosely to engage the slide valv e, a hole therethrough, an oil reservoir in the cylinder and a pipe in the hole leading to the reservoir and a detachable turning head on the stem and means for positioning it with respect to the stem, consisting of cooperating beveled surfaces on the stem and inside of the turning head on the stem and means For positioning it withrespect to the stem, consisting of cooperating beveled surfaces on the stem and inside of the turning head and means on thecasing adapted to limit the movement of the turning head.

27. A blow-off valve comprising a casing, a discharge cylinder, an encircling slide valve, a stem adapted loosely to engage the slide valve, a hole theretln'ough, an oil reservoir in the cylinder anda pi )c in the hole leading to the reservoir and a etachable turning head on the stem and means for positioning it with respect to the stem, consisting of cooperating beveled surfaces on the stem and inside of the turning head and means on the casing head. including stop-lugs on the casing and a projecting fln on the head.

28. A blow-oil valve comprising a casing, a discharge cylinder, an encircling slide valve, a stem adapted loosely to engage the slide valve, a hole therethrough, an oil reservoir in the cylinder and a pipe in the hole leading to the reservoir, in combination with a turning head on the stem and means for holding the parts together when in )osition, including an annular flange on the ischarge cylinder.

29. A blow-ofl' valve comprising a casing, a discharge cylinder, an encircling slide valve, a stern adapted loosely to engage the slide valve, a hole therethrough, an oil reservoir in the cylinder and a pipe in the hole leading to the reservoir, in combination with a turning head on the stem and means for holding the parts together when in position, including an annular flange on the discharge cylinder and a cooperating bottom edge on the casing.

30. A blow-oil valve, comprising a casing, a discharge cylinder, an encircling slide valve, a stem adapted loosely to engage the slide valve, a hole therethrough, an oil reservoir in the cylinder and a pipe in the hole leading to the reservoir, in combination with a turning head on the stem and means for holding the parts together when in position, including an annular flange on the discharge cylinder, and a cooperating bottom edge on the casing and bolts or screws adapted to pass through the annular flange and engage t e casing.

31. A blow-oft valve comprising a casing, a discharge cylinder,-an encircling slide valve, a stem adapted loosely to engage the slide alve, a hole therethrough, an oil reservoir in the cylinder and a pipe in the hole leading to the reservoir, in combination with a turning head on the stem provided with a projecting tin and means on the casing cooperating therewith to limit the extent of oscillation of the valve, consisting of projecting lugs adapted to embrace the fin on the turning head.

Witness my hand this 29th day of Decem ber, 1908, at New York, N. Y.

JOSEPH ROTHCHILD.

Witnesses:

HERMAN MEYER, ALAN MODONNELL. 

